<template>
  <div>
      <el-form  :rules="rules" 
                v-loading="loading"
                element-loading-text="正在登录..."
                element-loading-spinner="el-icon-loading"
                element-loading-background="rgba(0,0,0,0.8)"
                ref="loginForm" 
                :model="loginForm" 
                class="loginContainer">
          <h3 class="loginTitle">系统登录</h3>
          <el-form-item prop="username">
              <el-input type="text" auto-complete="false" v-model="loginForm.username" placeholder="请输入用户名"></el-input>
          </el-form-item>
          <el-form-item prop="password">
              <el-input type="password" auto-complete="false" v-model="loginForm.password" placeholder="请输入密码"></el-input>
          </el-form-item>
          <el-form-item prop="code">
              <el-input type="text" auto-complete="false" v-model="loginForm.code" placeholder="点击图片更换验证码" style="width:250px;margin-right:42px"></el-input>
              <img :src="captchaUrl" alt="验证码" @click="updateCaptcha">
          </el-form-item > 
          <el-checkbox v-model="checked" class="loginRemember">记住我</el-checkbox>
          <el-button type="primary" style="width:100%" @click="submitLogin">登录</el-button>
      </el-form>
  </div>
</template>

<script>
    export default {
        name:'Login',
        data() {
            return {
                captchaUrl:'/captcha?time='+new Date(),
                loginForm:{
                    username:'admin',
                    password:'123',
                    code:''
                },
                checked:true,
                loading:false,
                // 校验规则
                rules:{
                    username:[{
                        required:true,
                        message:'请输入用户名',
                        tigger:'blur'
                    }],
                    password:[{
                        required:true,
                        message:'请输入密码',
                        tigger:'blur'
                    }],
                    code:[{
                        required:true,
                        message:'请输入验证码',
                        tigger:'blur'
                    }]
                }
            }
        },
        methods: {
            submitLogin(){
                this.$refs.loginForm.validate((valid)=>{
                    if(valid){
                        this.loading = true;
                        this.postRequest('/login',this.loginForm).then(resp=>{
                            if (resp) {
                                this.loading = false;
                                // 存储用户token
                                const tokenStr = resp.obj.tokenHead+resp.obj.token;
                                window.sessionStorage.setItem('tokenStr',tokenStr);
                                // 跳转首页
                                let path = this.$route.query.redirect;
                                this.$router.replace((path == '/' || path == undefined) ? '/home' : path)
                            }
                        })
                    }else {
                        this.$message.error('请输入所有字段!')
                        return false;
                    }
                })
            },
            updateCaptcha() {
                // 用于刷新tupai
                this.captchaUrl = '/captcha?time='+new Date();
            }
        },
    }
</script>

<style>
    .loginContainer{
        border-radius: 15px;
        background-clip: padding-box;
        margin: 180px auto;
        width: 350px;
        padding:15px 35px 15px 35px;
        background: #fff;
        border:1px solid #eaeaea;
        box-shadow: 0 0 25px #cac6c6;
    }
    .loginTitle{
        text-align: center;
        margin:0px auto 10px auto 
    }
    .loginRemember{
        text-align: left;
        margin:0px 0px 15px 0px;
    }
    .el-form-item__content{
        display: flex;
        align-items: center;
    }
</style>